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From: Kleber Souza <kleber.souza@canonical.com>
To: linux-s390@vger.kernel.org, netdev@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>
Subject: s390x BPF JIT failures with test_bpf
Date: Wed, 27 Jun 2018 11:40:23 +0200	[thread overview]
Message-ID: <6a515d91-e831-e240-1ae6-ff0d6ead6cf2@canonical.com> (raw)

Hi,

When I load the test_bpf module from mainline (v4.18-rc2) with
CONFIG_BPF_JIT_ALWAYS_ON=y on a s390x system I get the following errors:

test_bpf: #289 BPF_MAXINSNS: Ctx heavy transformations FAIL to
prog_create err=-524 len=4096
test_bpf: #290 BPF_MAXINSNS: Call heavy transformations FAIL to
prog_create err=-524 len=4096
[...]
test_bpf: #296 BPF_MAXINSNS: exec all MSH FAIL to prog_create err=-524
len=4096
test_bpf: #297 BPF_MAXINSNS: ld_abs+get_processor_id FAIL to prog_create
err=-524 len=4096

From a quick look at the code it seems that
arch/s390/net/bpf_jit_comp.c:bpf_int_jit_compile() is failing to JIT
compile the test code.

Are those failures expected and could be flagged with FLAG_EXPECTED_FAIL
on lib/test_bpf.c or are those caused by some issue with the s390x JIT
compiler that needs to be fixed?


Thanks,
Kleber

             reply	other threads:[~2018-06-27  9:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-27  9:40 Kleber Souza [this message]
2018-06-27 10:01 ` s390x BPF JIT failures with test_bpf Daniel Borkmann
2018-06-27 10:13   ` Kleber Souza
2018-06-27 10:36     ` Daniel Borkmann
2018-06-27 12:30       ` Kleber Souza

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